结构静力分析边界条件施加方法与技巧——约束实例篇

2016-12-21 by:CAE仿真在线来源:互联网

ABAQUS对于弯矩和轴力的输出,是通过定义界面,然后输出到*.dat文件中去的。实现该功能需要两个命令配合使用:

1、关于截面的定义:

*Elset, elset=_Surf-5_S4, internal,instance=Part-1-1, generate
47 , 97
*Surface, type=ELEMENT, name=Surf-5
_Surf-5_S4, S4

2、关于截面结果的输出:

(sof,som,详细可以在ABAQUS的帮助文件中查询)

*section print,name=50,surface=Surf-50,axes=local,frequency=1,update=yes
, 2.000000 , 0.5000000
, 1.500000 , 0.5000000
sof,som

上面主要是根据单元定义截面的过程,对于大量的截面定义,可以利用Fortran编写文本转换工具,直接生成定义截面和输出截面的inp文件。

下图是受均布荷载的悬臂梁的计算示意图:

结构静力分析边界条件施加方法与技巧——约束实例篇abaqus有限元技术图片1
计算完成之后,在.dat文件输出的结果内容如下所示:

section name 12
surface name assembly_surf-12
system of coordinates local
update of the local system yes
definition of the local system
->current anchor point coords 78.000 0.50000 0.0000
->current direction cosines of the local axes
axis 1: 0.0000 1.0000 0.0000
axis 2: -1.0000 0.0000 0.0000
axis 3: 0.0000 0.0000 1.0000

note: the above system of coordinates is meaningful only for the sof and som variables.

note: socf is always reported in the global coordinate system. if the dot product of sof
and som is not equal to zero, centroid of the section is reported as socf, and som
is not equal to the cross product of socf and sof.

the following tables are printed

sofm sof1 sof2 sof3 somm som1 som2 som3

2100. -2100. -4.5571e-02 0.000 2.4200e+04 0.000 0.000 -2.4200e+04